Apparatus for sealing receptacles.



E. GOLTSTBIN. APPARATUS FOR SEALING REOEPTACLES.

APPLICATION FILED 0093.24, 1908.

945 ,5 1 6 Patented Jan. 4, 1910.

UNITED STATES PATENT OFFICE.

nwALn GOL'ISTEIN, or concerns. GERMANY.

APPARATUS FOR SEALING REGEPTACLES.

Specification of Letters Patent.

Patented Jan. 4, 1910.

Application filed October 24, 1908. Serial No. 459,292.

lb all whom it may concern:

.Be it known that I, EWALD GOLTSTEIN, a

subject of the King of Prussia and Emperor of Germany, and a resident of Co'- logne, Germany, have invented certain new and useful Improvements in Apparatus for Sealing Receptacles, of which the following is a specification.

My invention relates to sealing receptacles with metallic caps by means of apparatus such as I have described in U. S. Patents Nos. 743,636 and 812,648 in which a resilient presser or pressure gasket is employed for forcing the cap or capsule into tight contact with the receptacle.

The object of the improvements is to pro.-

vide suitable means for sealing receptacles with metallic or equivalent caps containing thin plastic packing rings, in such a manner that, after sealing, the closure may be subjected to considerable pressure from within without danger of breaking the seal. Such pressure may arise from the presence of carbonic acid gas-in carbonated beverages, or from processing the contents in the receptacles after sealing.

The proceeding and apparatus described in the patents mentioned above give good resultswith caps in which the packing is an elastic disk, made of cork for example, and which is thick enough to easily compensate for the irregularities of an uneven bottle mouth. The proceeding is not safe however,

if, instead of thick elastic disks, thin plastic packing rings are used. Such rin s may sufiice, lnitially, to fill up the interstices between the. cap and upper edge of the receptacle, but if the cap be subjected to internal pressure which tends to force it into a spherical shape and to lift it from the receptacle, the thin plastic packing ring loses its efficiency and a leak results. I find, however, that this diflicultycan be overcome by causing the packing which has been inserted in the top .of the capsule, to be forced downs wardly in the sealing operation and tightly pressed between the side walls of the cap and receptacle. Thus the seal is made on the side or outer edge of the receptacle neck instead of on the top or upper edge. Consequently when the. closure is subjected to pressure from within, which tends to lift the cap, the packing is so situated that it does not lose its efiiciency. If anything, the outward forcing of the top of the cap tends to draw its sides into even tighter contact with the receptacle thereby increasing .the pressure on the packing. To accomplish these results, it is necessary to make certain modifications in my former apparatus which can be readily understood, however, by ref;- erence to the accompanying drawing in which,

Figure 1 is a sectional view of a portion of an apparatus for carrying out my invention,

together with a suitable cap and receptacle Important features of my invention consist in so shaping or forming the lower portion of the block S and so regulating its position in relation to the presser G that the latter, when subjected to pressure by the cylinder R,'is pressed against the ca E in such a'way as to force the packing into the desired position and to secure it there,

substantially as described above and as illustrated in Fig. 2.

In sealing, the'sequence of operations is as follows. The receptacle F is brought to bear against the block S with suflicient force to prevent it from receding when subjected to the pressure of the presser G. The cylinder R is then caused to move in the direction of the presser G, subjecting G to pressure which is transmitted tothe cap E tending to force it into tight contact with the re-" ceptacle F. It is ossible to accomplish this result in two di erent ways, always providing that the receptacle F is so pressed against the block S that there is norelative movement between the two. Either S and T may be rigidly connected and R moved against G, or, S and B may be connected so as to move together against G. Thelatter arrangement is not illustrated as it may form the subject matter of a separate application. For convenience, in practice,

the block S is made adjustable so that its position may be readily regulated in relation to the presser G. I generally use for the presser G a comparatively soft rubber gasket. If a harder gasket is used, greater pressure is required and the position of the block S must be adjusted in relation to G in order that the latter may operate properly.

It will be observed that the block S used in the present invention diflers from that shown in U. S. Patents 743,636 and 812,648 in that the lower portion of it is so formed or beveled as to cause the presser G when under pressure to act not only on the side walls of the cap E, but also upon the outer periphery of its top.

The great commercial advantage of the invention lies in the fact, that the method em loyed renders it ossible to use successful y for closures estined to withstand high internal pressure, the economical form of cap, in which a cheap plastic packing has been inserted in top in the ordinary way. To place such a packing inside of the cap around the side walls is not feasible on account of the difficulty and expense.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In an apparatus for appl ing caps to receptacles, the combination 0 a casing, a yielding presser in engagement therewith,|

a cylinder movable to deform the presser,

and a block located within said cylinder and provided with an inwardly beveled lower face to allow the presser to spread inward and reach the top surface of the cap.

2. In an apparatus for applying caps to receptacles, the combination of a casing, an annular yielding presser in engagement therewith, movable means engagmg the form it, and a block having a beveled surface to allow the presser to spread laterally and at the same time assist in deflecting it downward on a portion of the caps top.

In testimony, that I claim the foregoing for applying caps to as my invention, I have signedmy name in presence of two subscribing witnesses.

EWALD GOLTSTEIN.

Witnesses:

JULIUS A. LANDSBERGER, LOUIS VANDORN. 

